Rather than buying a squadron of Su 25 Army will prefer more arty and more missiles
Buying a plane means creating a lot of infrastructure like training pilots; mechanics for maintenance
selecting and storing ammunition and storing spares ,
The actual practice of attacking ground targets is the next level
there you also need ATC and suitable ground stations have to be set up
All these things take money and time
ALL these things are available ONLY with the IAF and there is no point duplicating all these things
IAF has many forward air bases all along the western front
The army has to be specific where exactly it needs more air support
IAF will simply add more Jaguars in its fleet if IA convinces IAF that air support is lacking
Those maintenance-lacking
Sukhoi-25s did pretty well in Georgia, don't you think so? While maintaining
Jaguars would be more expensive,
Sukhoi-25s will go light on the pocket. At the end of the day, it is GoI who has to pay for all this.
Sukhoi-25s can easily go to the point where air support is required and soften up any resistance while arty pieces will remain vulnerable and slow moving. In a Cold Start like scenario, we would not be aiming to go deep into Pakistani heartland but grab as much territory along the border as possible and force them to negotiate. In such an event, the short range of
Sukhoi-25s will not be a bane but a boon. Also,
Sukhoi-25s offer great flexibility with fuel: aviation fuel, kerosene or diesel.